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由天津市新垦兽药厂一参照国际先进工艺,采用优良菌与优质原料生产的杆菌肽锌饲料添加剂,质量稳定,使用效果显著,对革兰氏阳性菌有很强的抗菌作用,特别对耐青霉素葡萄球菌感染所致疾病,有很好的预防和治疗效果n杆菌肽锌饲料添加剂在动物体内不残留,不产生耐药性,适用于猪、牛、鸡等多种畜禽,对各种畜禽使用均无停药期要求,是世界上饲养业中广泛使用的抗生素类饲料添加剂。杆菌肽锌──高效饲料添加剂@李玉芹 相似文献
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杆菌肽锌在畜禽中的应用及其安全性评价 总被引：2，自引：0，他引：2
杆菌肽锌是一种应用广泛的饲料添加剂,可在动物初生至上市各生长阶段使用,没有上市前、产蛋和泌乳期的停药要求,也没有用药的使用期限。1 杆菌肽锌的理化性质杆菌肽锌(ZincBacitracin)由于其高效、无毒副作用、无残留、不产生抗药性及交叉耐药性等优点被广泛应用于畜禽养殖业。1 960年美国批准将杆菌肽锌用作饲料添加剂,使杆菌肽锌得到迅速发展。目前在生产中杆菌肽锌是由地衣芽孢杆菌发酵而制成。杆菌肽锌是一种多肽类畜禽专用抗生素,为淡褐色至褐色粉末,具有特殊气味,易溶于吡啶,难溶于乙醚、甲醇、丙酮和氯仿,不溶于水。杆菌肽锌可在室… 相似文献
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杆菌肽锌对高温季节蛋鸡生产性能的影响 总被引：3，自引：0，他引：3
杆菌肽锌（ZincBacitracin）是杆菌肽与硫酸锌或氧化锌结合生成的络合物，是目前应用较广泛的畜禽专用饲料添加剂。据资料报道，饲料中添加20～35ppm的杆菌肽锌对增进畜禽健康，提高生产性能和饲料转化率有良好的作用，但杆菌肽锌还具有另外一大功能，即在使用剂量较高时能降低 相似文献
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在配合饲料中,应用添加剂中的抗菌素品种很多,而且使用越来越广泛。但有些抗菌素由于长期使用,导致畜体产生抗药性,降低了效能,还会使一些毒素残留在畜禽机体中,给消费者带来危害。所以,寻找高效,低残留、耐药性低的抗菌素,是当前一项新课题。杆菌肽锌是由杆菌属地衣型芽孢杆菌所产生的多肽系抗菌素。杆菌肽锌对抑制葡萄球菌、链球菌、细小球菌、杆菌等革兰氏阳性菌有效,而抗敌素对抑制沙门氏杆菌、大肠埃希氏杆菌、波氏杆菌、志贺氏痢疾杆菌、产气杆菌等革兰氏阴性菌有效。 相似文献
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杆菌肽是多肽类抗生素,有多种异构体,包括杆菌肽A、Al、B、C、D、E、Fl、F2、F3和G。目前生产中应用的多为杆菌肽A,其结构是由12个氨基酸组成的多肽,由于极易吸潮和被分解,生产中常在发酵达到杆菌肽效价最高时,在培养液中直接加入锌盐,以生成较稳定的杆菌肽锌络合物,即杆菌肽锌,是目前应用最多的抗生素饲料添加剂。1主要优点杆菌肽锌是畜禽专用抗生素,具有畜禽吸收量 相似文献
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1杆菌肽锌
杆菌肽锌抗菌谱与青霉素相似,对革兰阳性菌有特效,对革兰阴性菌、螺旋菌、放线菌也有效,其特点是高效低毒,几乎不产生抗药性。杆菌肽锌是畜禽专用的添加剂,多年来一直被普遍使用,添加量为4×10-5～4×10-5。注意杆菌肽锌不能与莫能霉素、盐霉素等聚醚类抗生素混用。 相似文献
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杆菌肽锌可促进草鱼鱼种生长 总被引：2，自引：0，他引：2
杆菌肽锌(BacitracinZine)为多肽类饲料添加剂，是饲养业中使用最为广泛也最为安全的抑菌促生长剂之一。国内，杆菌肽锌已较普遍地用于畜禽养殖业，用于鱼类养殖还未见报道。我们作了用于草鱼鱼种的饲养试验。将天津兽药厂生产的杆菌肽锌制成预混料(含15％的杆菌肽锌),用量占配合饲料5％，与基础饲料(鱼粉、大豆粉、薯粉、玉米粉、麦麸等)混和均匀，用绞肉机加工成粒径2mm左右的颗粒饲料，晒干后饲喂。颗粒饲料水份含量平均为11.03％，粗蛋白28.69％粗脂肪6.5％。试验时间为1993年7月19日──1993年8月29日，每天水温变化23.5℃──33℃，… 相似文献
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<正>1西药类饲料添加剂1.1多肽类多肽类饲料添加剂吸收差、排泄快、无残留、毒性小。抗药性细菌出现概率低,且抗药性不易通过转移因子传递给人。常用的有杆菌肽锌、那西肽、恩来霉素、持久霉素、维吉尼亚霉素、硫肽霉素、阿伏霉素、硫酸粘杆菌素等。前几种主要抗革兰氏阳性菌(G+),硫酸粘杆菌素抗革兰氏阴性菌(G-)。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献